10077 usr/src/uts/ Makefile changes for smatch

*** 8,18 ****
  # source.  A copy of the CDDL is also available via the Internet at
  # http://www.illumos.org/license/CDDL.
  #
  
  #
! # Copyright 2017 Joyent, Inc.
  #
  
  UTSBASE = ../..
  
  MODULE          = i40e
--- 8,18 ----
  # source.  A copy of the CDDL is also available via the Internet at
  # http://www.illumos.org/license/CDDL.
  #
  
  #
! # Copyright (c) 2018, Joyent, Inc.
  #
  
  UTSBASE = ../..
  
  MODULE          = i40e
*** 41,50 ****
--- 41,53 ----
  # The Intel common code defines some enums which are valid unsigned ints that
  # GCC is fine with, but not Studio.
  #
  CERRWARN   += -_cc=-erroff=E_ENUM_VAL_OVERFLOWS_INT_MAX
  
+ # 3rd party code
+ SMOFF += all_func_returns
+ 
  LDFLAGS         += -dy -N misc/mac
  
  .KEEP_STATE:
  
  def:            $(DEF_DEPS)